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43results about How to "Good responsiveness" patented technology

Multistage hole ZSM-5/SiO2 catalyst, preparation method catalyst, and n-octane catalytic cracking method

The invention provides a multistage hole ZSM-5/SiO2 catalyst, a preparation method of the catalyst, and an n-octane catalytic cracking method. The preparation method of the catalyst comprises the following steps: stirring and mixing 15-35 parts by weight of TPAOH (Tetrapropylammonium Hydroxide) and 10-25 parts by weight of water, sequentially adding 0.1-0.6 part by weight of aluminium isopropoxide and 15-30 parts by weight of TEOS (Tetraethyl Orthosilicate) every half hour, and then stirring and mixing for 6-24 hours to obtain a mixed solution; heating the mixed solution to 40-60 DEG C for carrying out alcohol evaporating treatment for 4-8 hours, and supplementing water lost due to evaporation in the alcohol evaporating process; after the alcohol evaporating treatment is completed, adding a macroporous-mesoporous SiO2 carrier, stirring for 30-60 minutes, and then carrying out crystallization treatment at 80-140 DEG C for 48-84 hours; centrifugalizing, cleaning and drying products which are subjected to the crystallization treatment, and then calcining at 500-550 DEG C to obtain the multistage hole ZSM-5/SiO2 composite catalyst. The invention also provides the multistage hole ZSM-5/SiO2 catalyst prepared through using the mehtod. The invention also provides the n-octane catalytic cracking method by adopting the multistage hole ZSM-5/SiO2 catalyst.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)

Composite Fe3O4 type structured catalyst used for hydrogen production from methane, and preparation method thereof

The invention relates to a composite Fe3O4 type structured catalyst used for hydrogen production from methane. The catalyst is composed of cordierite ceramic honeycomb carrier and attachments attached to the surface of the cordierite ceramic honeycomb carrier. The attachments consists of Fe3O4 and auxiliary ingredients, wherein the auxiliary ingredients is the oxides of one or more of the following elements: Mn, Zr, Ni, Co, Cu, Cr, W, V, Ti, Al, and the total molar amount of the metal elements in the auxiliary ingredients is 1-30% of the molar amount of the Fe element in the Fe3O4. The preparation method of the structured catalyst comprises the steps of: preprocessing the cordierite ceramic honeycomb carrier; preparing solution of the auxiliary ingredients; adding a precipitating agent to the solution of the auxiliary ingredients; filtering the metal ions to form a filter cake; drying and roasting the filter cake to obtain a powdery catalyst; adding distilled water and pseudo-boehmite to the powdery catalyst to obtain a slurry; and adding the ceramic honeycomb carrier into the slurry, drying and roasting. The structured catalyst has the advantages of good catalytic properties, long service life time, and simple and feasible preparation method.
Owner:SOUTHEAST UNIV

Regenerative control hydraulic system

PendingCN110541857ASimplified regeneration and regeneration cutoff controlGood responsivenessServomotor componentsServomotorsHydraulic pumpControl valves
The invention relates to a hydraulic system of a working machine, and particularly relates to a regenerative control hydraulic system. The regenerative control hydraulic system includes at least one hydraulic pump which ejects working oil, an actuator which works by means of supply of the working oil from the at least one hydraulic pump, a regenerative oil path for sending return oil as regenerative oil to a negative-pressure cavity of the actuator and a regenerative cut-off oil path. The return oil is the working oil discharged from the actuator, the regenerative oil path is provided with a regenerative valve and a control valve III, the control valve III is used for controlling the regenerative oil to enter the negative-pressure cavity of the actuator when a working device contracts back, or the oil is discharged from the actuator to the regenerative cut-off oil path when the working device outwards sways; and the regenerative cut-off oil path sends the regenerative oil of the regenerative valve or the oil discharged from the actuator to other destinations, and the regenerative cut-off oil path is provided on a regenerative cut-off valve. The technical problems of the complexityof regeneration and regenerative cut-off control structures, low regulation and slow response in a regenerative control cut-off hydraulic system in the prior art are solved.
Owner:JIANGSU HENGLI HYDRAULIC TECH CO LTD

A doubly-fed wind power generation system under unbalanced grid voltage and a control method thereof

The invention provides a doubly-fed wind power generation system under unbalanced grid voltage and a control method thereof, The stator side voltage of the fan remains three-phase balance under the unbalanced network voltage by adding a series network-side converter, which ensures the three-phase current balance of the stator and the rotor, and improves the operation performance of the doubly-fedfan under the unbalanced network voltage. Based on the second harmonic generation (SHG) of power generated by series grid-side converter (SSC), a new method based on proportional-difference (DDD) is proposed in this paper. The control strategy of the parallel-networked converter of the resonant power compensator maximizes the power doubling component generated by the parallel-to-grid converter tobe equal to the power doubling component generated by the series-to-grid converter, thereby simultaneously suppressing the active and reactive power doubling fluctuations of the doubly-fed wind powergeneration system, and improving the output quality of the system; The anti-jamming ability of doubly-fed wind power generation system under grid voltage fault is greatly enhanced.
Owner:ELECTRIC POWER RES INST OF EAST INNER MONGOLIA ELECTRIC POWER +3
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